EP0562457B1 - Solenoid - Google Patents

Solenoid Download PDF

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Publication number
EP0562457B1
EP0562457B1 EP93104431A EP93104431A EP0562457B1 EP 0562457 B1 EP0562457 B1 EP 0562457B1 EP 93104431 A EP93104431 A EP 93104431A EP 93104431 A EP93104431 A EP 93104431A EP 0562457 B1 EP0562457 B1 EP 0562457B1
Authority
EP
European Patent Office
Prior art keywords
solenoid
wire
core
pinion
disposed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93104431A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0562457A1 (en
Inventor
Giancarlo c/o Fasola
Mario Bassi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrie Magneti Marelli SRL
Marelli Europe SpA
Original Assignee
Industrie Magneti Marelli SRL
Magneti Marelli SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrie Magneti Marelli SRL, Magneti Marelli SpA filed Critical Industrie Magneti Marelli SRL
Publication of EP0562457A1 publication Critical patent/EP0562457A1/en
Application granted granted Critical
Publication of EP0562457B1 publication Critical patent/EP0562457B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/06—Parameters used for control of starting apparatus said parameters being related to the power supply or driving circuits for the starter
    • F02N2200/065—Relay current

Definitions

  • the invention relates to a solenoid usable, in particular, in an electromagnetic operating device forming part a starter system for an internal combustion engine and, more specifically, to a solenoid consisting in known manner of an electrical wire wound substantially in a helix.
  • a solenoid is disclosed in EP-A-0 225 444 wherein a measuring resistor is connected to the solenoid for measuring the current flow.
  • the solenoid according to the invention is characterised in that a portion of the wire is bent so as to be substantially U-shaped, and is disposed in such a manner that, in operation, the magnetic flux linkage with this portion is low, or even essentially zero; the ends of this portion of the solenoid are accessible from the outside to enable the measurement, in use, of the voltage drop in the said portion, which is indicative of the intensity of the current flowing in the solenoid.
  • This portion of the wire forming the solenoid acts as a resistive shunt and, to advantage, is an end portion of the wire, which is preferably twisted and disposed outside the solenoid, and oriented substantially parallel to the axis of the solenoid.
  • a starter system for an internal combustion engine for motor vehicles includes a starter unit of the type shown in Figure 1.
  • the unit includes a support casing 1 in which an electric starter motor 2 and an electromagnetic operating device 3 are mounted.
  • an overrunning (free wheel) coupling 4 is fitted to the shaft of the electric motor 2.
  • a sleeve 5 is movable on the shaft of the motor 2, together with the coupling 4.
  • a rocker lever, indicated 8 can pivot about a fulcrum 9 and acts as a transmission member between the sleeve 5 (which acts as a member for moving the pinion 6) and a movable core 10 of the electromagnet 3.
  • the electromagnet has an operating winding or solenoid 11, supported by a spool 12, inside which the core 10 is movable axially.
  • One end of the core has an axial extension 13, around which a small plate 14 is fixed.
  • the end of the extension has an appendage 15 containing a slot 16, through which one end 8b of the rocker lever extends.
  • the lever 8 is of the leaf spring type, and consists of two substantially Y-shaped metal plates joined together, and having lower ends 8a forming two prongs which engage in seats 5a in the sides of the sleeve 5.
  • a helical spring, indicated 17, reacts against the small plate 14, keeping the core 10 in the position shown, in which it projects partially from the operating winding or solenoid 11.
  • the far end of the core 10 from its extension 13 has a frustoconical recess 18.
  • a fixed core, generally indicated 19, is inserted in the end of the spool 12 of the electromagnet, which faces away from the side opposite the lever 8.
  • the fixed core has a passage 20 coaxial with the spool 12 and the core 10.
  • One end of the passage opens in the centre of a frustoconical protuberance 21 of the fixed core, the protuberance 21 facing the recess 18 of the movable core 10, and being complementary in shape thereto.
  • a contact member a mobile contact
  • a spring 28 is interposed between the insulating body 24 and the end head of the rod 22 and - at rest - keeps the latter in the position shown, in which its other end extends towards the movable core 10, projecting beyond the protuberance 21 of the fixed core 19. In this condition the mobile contact 25 is separated from the fixed contacts 26 and 27.
  • This movable contact and the associated fixed contacts together constitute an electrical switch which controls the current supply to the electric motor 2 (in known manner).
  • the switch closes when, as a result of the excitation of the operating solenoid 11, the movable core 10 moves towards the fixed core 19, giving rise (in the final stage of its travel) to the movement of the rod 22 and of the associated movable contact 25 towards the fixed contacts 26 and 27.
  • a starter system for the internal combustion engine of a motor vehicle includes a direct-current voltage supply 30, advantageously consisting of the vehicle battery.
  • the negative pole of the battery 30 is earthed and the positive pole is connected to a junction 31.
  • a manually-operated switch 34 incorporated, for example, in a conventional ignition and starting switch operable by means of a key.
  • the solenoid 11 of the electromagnetic operating device 3 is connected in the circuit branch 32, and has one terminal 11a connected to the switch 34, and another terminal indicated 11b.
  • An electronic device 35 with controlled-conduction such as, for example, a MOS transistor, is connected between the terminal 11b and earth. This device has an input or control terminal connected to an electronic control unit indicated ECU.
  • the solenoid 11 consists (in known manner) of a wire wound substantially in a helix.
  • the portion 11d is an end portion of the wire which forms the solenoid 11.
  • this portion of the solenoid is disposed outside the solenoid, and is oriented essentially parallel to the axis of the solenoid.
  • the ends of the portion 11d of the solenoid 11 are accessible from the outside by means of the terminal 11b and a further terminal, indicated 11c.
  • the shape and arrangement of the portion 11d of the solenoid 11 are such that, in operation, the magnetic flux linkage with this portion is very low and virtually zero.
  • the terminals 11b and 11c are connected to corresponding inputs of the control unit ECU.
  • a diode 36 is disposed between the terminals 11a and 11b to protect the transistor 35 against overvoltages.
  • the portion 11d of the solenoid 11 acts essentially as a resistive shunt and the voltage drop between the terminals 11b and 11c is indicative of the intensity of the current flowing in the solenoid.
  • the control unit ECU is arranged to drive the controlled-conduction device 35 in such a manner that the current flowing in the solenoid 11 (measured by the unit by means of the portion 11d of the solenoid) varies according to a predetermined time law, to which a predetermined law of variation of the speeds of movement of the movable core 10 and the pinion 6 corresponds.
  • the unit ECU is arranged to drive the controlled-conduction device 35 in such a manner that the speeds of the movable core 10 and of the pinion 6 when they reach their respective operative positions are below a predetermined value, for example, of the order of 0.2 m/sec.
  • the unit ECU may be formed with the use of conventional analogue circuits or possibly at least partly with digital circuits.
  • the unit actually controls the speed of movement of the core 10 and of the pinion 6 by controlling the current which flows in the solenoid 11, and is measured by means of the portion 11d thereof.
  • the portion 11d of the solenoid which is advantageously disposed inside the same casing 40 as the solenoid, undergoes the same variations in resistance with variations in the operating temperature as the solenoid itself. This prevents errors in the measurement of the current flowing in the solenoid, which could occur if the portion 11d which acts as a resistive shunt were subjected to temperature conditions different from those of the solenoid 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnets (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
EP93104431A 1992-03-24 1993-03-18 Solenoid Expired - Lifetime EP0562457B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO920250 1992-03-24
ITTO920250A IT1263110B (it) 1992-03-24 1992-03-24 Sistema di avviamento per un motore a combustione interna e solenoide utilizzabile in tale sistema di avviamento

Publications (2)

Publication Number Publication Date
EP0562457A1 EP0562457A1 (en) 1993-09-29
EP0562457B1 true EP0562457B1 (en) 1996-11-13

Family

ID=11410273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104431A Expired - Lifetime EP0562457B1 (en) 1992-03-24 1993-03-18 Solenoid

Country Status (6)

Country Link
US (1) US5383428A (it)
EP (1) EP0562457B1 (it)
JP (1) JPH0617728A (it)
DE (1) DE69305893T2 (it)
ES (1) ES2094950T3 (it)
IT (1) IT1263110B (it)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1279543B1 (it) * 1995-02-17 1997-12-16 Magneti Marelli Spa Dispositivo per il controllo elettronico di un elettromagnete di innesto, in particolare per un motorino d'avviamento.
IT1279542B1 (it) * 1995-02-17 1997-12-16 Magneti Marelli Spa Dispositivo sensore per il controllo elettronico di un elettromagnete di innesto, in particolare per un motorino d'avviamento.
US5622148A (en) * 1995-12-04 1997-04-22 Ford Motor Company Control for a motor vehicle cranking system
IT1285351B1 (it) * 1996-05-21 1998-06-03 Magneti Marelli Spa Dispositivo di avviamento per motore a combustione interna.
JPH10169533A (ja) * 1996-10-09 1998-06-23 Denso Corp スタータ
IT1289670B1 (it) * 1996-11-20 1998-10-16 Fiat Ricerche Dispositivo per il controllo di un elettromagnete di innesto per l'avviamento di un motore a combustione interna, in particolare per
DE19702932A1 (de) 1997-01-28 1998-07-30 Bosch Gmbh Robert Schaltungsanordnung für ein Einrückrelais
FR2760910B1 (fr) * 1997-03-14 1999-05-28 Valeo Equip Electr Moteur Dispositif pour la commande d'un contacteur de demarreur de vehicule automobile
JP4108920B2 (ja) * 1997-07-17 2008-06-25 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 内燃機関の始動装置のための電流測定モジュール
US6104157A (en) * 1997-10-11 2000-08-15 Robert Bosch Gmbh Apparatus and method for controlling an electrical starter of an internal combustion engine
FR2771780B1 (fr) * 1997-12-03 2000-02-18 Valeo Equip Electr Moteur Procede et dispositif pour la commande de l'alimentation du bobinage d'un contacteur de demarreur de vehicule automobile
IT1296627B1 (it) * 1997-12-11 1999-07-14 Magneti Marelli Manufacturing Dispositivo per l'avviamento di un motore a combustione interna.
IT1303172B1 (it) 1998-07-10 2000-10-30 Fiat Ricerche Dispositivo circuitale di controllo di un elettromagnete associatoad un motore elettrico di avviamento per un motore a combustione
JP4321796B2 (ja) 2000-08-10 2009-08-26 株式会社デンソー スタータ制御方法
JP2002106447A (ja) * 2000-10-02 2002-04-10 Mitsubishi Electric Corp スタータ保護装置
JP3770081B2 (ja) * 2000-12-01 2006-04-26 株式会社デンソー スタータ用マグネットスイッチ
US7145259B2 (en) * 2003-11-11 2006-12-05 Remy Inc. Engine starting motor anti-milling device
DE102005021227A1 (de) * 2005-05-09 2006-11-16 Robert Bosch Gmbh Startvorrichtung für Brennkraftmaschinen in Kraftfahrzeugen
DE102010062241A1 (de) * 2010-12-01 2012-06-06 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Starters eines Fahrzeugs
JP6414553B2 (ja) * 2016-01-21 2018-10-31 株式会社デンソー スタータ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3543055C1 (de) * 1985-12-05 1986-12-11 Meyer, Hans-Wilhelm, Dr., 2000 Hamburg Schaltungsanordnung zum Ansteuern eines Elektromagneten
KR900009058B1 (ko) * 1987-02-25 1990-12-17 미쓰비시전기 주식회사 전자 스위치 장치
US4901689A (en) * 1988-12-12 1990-02-20 General Motors Corporation Electronic starting motor control having automatic disengagement and lockout
US5038247A (en) * 1989-04-17 1991-08-06 Delco Electronics Corporation Method and apparatus for inductive load control with current simulation

Also Published As

Publication number Publication date
IT1263110B (it) 1996-07-30
DE69305893T2 (de) 1997-04-17
ITTO920250A1 (it) 1993-09-24
EP0562457A1 (en) 1993-09-29
JPH0617728A (ja) 1994-01-25
DE69305893D1 (de) 1996-12-19
ITTO920250A0 (it) 1992-03-24
ES2094950T3 (es) 1997-02-01
US5383428A (en) 1995-01-24

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